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5 Cards in this Set
- Front
- Back
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Funiculus gracilis (FG)
Funiculus cuneatus(FC): Nerve tracts: Are ascending or descending? |
FG and FC are a pair ASCENDING (SENSORY) tracts the DORSAL side of the cord. Called DORSAL COLUMN
*they transmit impulses up the cord to the thalamus of the brain stem. From there, the impulses will be conducted into the PARIETAL LOBE cortex to be perceived for the following SENSORY awareness's: Touch, Vibration, Feeling of Pressure, Being aware of where your body parts are and awareness of movement of body parts. *There nerve tract cross the opposite side of the brain within the MEDULLA! |
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Anterior and Posterior Spinothalamic: Nerve tracts
Are they ascending or descending? |
Ant/Post. Spinothalamic are pair of ASCENDING (SENSORY) tracts on the LATERAL side of the cord. Called LATERAL SPINOTHALAMIC TRACT. Like FG/FC they transmit impulses up the cord into the thalamus, then for projecting into the PARIETAL LOBE cortex for perception of the following: Hot & Cold Sensations, Pain, Ticle, Itch, and Sexual Stimulation.
*These nerve tracts cross to the opposite side of the CNS within the spinal cord itself, at about the area of the spinal cord in which the SENSORY neurons brought the impulse from the body parts. |
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Posterior Spinocerebellar: Nerve tract:
Are they ascending or descending? |
Post. Spinocerebellar are ASCENDING (SENSORY) tract conducting impulses into the cerebellum from the spinal cord. This enables the cerebellum to be aware of the position of body parts, degree of muscle contraction, joint angulations, ect. so the cerebellum will be able to coordinate your muscle movements.
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Rubrospinal aka Extra-pyramidal tract: Are ascending or descending?
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Rubrospinal are DESCENDING (MOTOR) and transmit impulses down the spinal cord from the cerebellum, basal nuclei, and FRONTAL LOBE cortex (motor area) for eventual conduction to your muscles by motor neurons for Subconscious Muscle Movements and Control.
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Corticospinal aka Pyramidal tract: Is it ascending or descending?
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Corticospinal are DESCENDING (MOTOR) and transmit impulses down the cord from the PRIMARY MOTOR AREA (ANTERIOR CENTRAL GYRUS) of the FRONTAL LOBE cortex for eventual conduction to your muscles by motor neurons for Conscious Muscles Movements and Control.
"CONSCIOUS MUSCLE CONTRACTION" |
